Baumgartner filed for divorce on May 1 after 18 years of marriage to the 'Yellowstone' star.
Jeezy's filing comes more than two years after he and former co-host of 'The Real' tied the knot.
Baumgartner made the revelation in court documents while explaining why she requested $855k from Costner for her attorney's fees.
The filing comes nearly two years after the couple welcomed their first child together, daughter Monaco.
They were first spotted out together just weeks after Sam Asghari filed for divorce last month.
The two were spotted hanging out in late August, just weeks after her split from Sam Asghari.
The filing comes less than a week after Costner's estranged wife was sanctioned and ordered to pay his $14,237.50 attorney's fees.
Zolciak is also adamant she's not leaving her house after Kroy filed court docs requesting to sell their $3M home.
A source tells ET, Joe ‘is surrounded by family and it’s nice for the kids to be around their aunts, uncles, and cousins.’
The rocker performed with his brothers on their Arizona stop of The Tour on Wednesday.
The order comes less than a week after Costner's monthly child support payments were drastically reduced.
The court on Sept. 1 ordered that Costner's child support payments to Christine Baumgartner be significantly reduced.
The couple were married for four years and share two children.
The couple is calling it quits after four years of marriage and two children.
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